Demon vs Holley (who do you like best)

Gentlemen, iam running a 600 eddy on my beefed up 318, but the carb is getting old and tired(Guess it needs a rebuild) A thought crossed my mind to buy a 650 holley or maybe a demon?. I have never ran a demon carb, are they good for the street? or they more for the strip? They look like a holley, which carb is better? is 650 to big for a 318? if so i will get the eddy rebuildt Thanks in advance Newathis